Additivity Rule for Electron–Molecule Total Cross Section Calculations at 50–5000 eV: A Geometrical Approach

Autor:	Ma Heng, Shi De-Heng, Zhu Zun-Lue, Sun Jin-Feng, Yang Xiang-Dong
Rok vydání:	2007
Předmět:	Physics Cross section (physics) Range (particle radiation) Electron energy Additive function General Physics and Astronomy Shielding effect Molecule Electron Atomic physics Electron scattering
Zdroj:	Chinese Physics Letters. 24:2819-2822
ISSN:	1741-3540 0256-307X
Popis:	To quantify the changes of the geometric shielding effect in a molecule as the incident electron energy varies, we present an empirical fraction, which represents the total cross section (TCS) contributions of shielded atoms in a molecule at different energies. Using this empirical fraction, a new formulation of the additivity rule is proposed. Using this new additivity rule, the TCSs for electron scattering by CO2, C2H2, C6H12 (cyclo-hexane) and C8H16 (cyclo-octane) are calculated in the range 50–5000 eV. Here the atomic cross sections are derived from the experimental TCS results of simple molecules (H2, O2, CO). The quantitative TCSs are compared with those obtained by experiments and other theories, and good agreement is attained over a wide energy range.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ba91b9a4dbc5d79939365ad307d67196 https://doi.org/10.1088/0256-307x/24/10/029 Zobrazit plný text záznamu